Leon Cheng, MD

Internal Medicine

Leon Cheng is an Internal Medicine specialist based in Sunnyvale, CA with over 26 years of clinical experience. Medicare-enrolled per CMS records and offers virtual telehealth visits.

Also practices: PEDIATRIC MEDICINE

(408) 730-4262Sunnyvale, CA
Telehealth Available
NPI Active per CMS — Q2 2026|Medicare Enrolled|Order & Refer

With over 26 years in internal medicine, Leon Cheng, MD is a long-established internist in Sunnyvale. A University of California, Davis School of Medicine graduate since 2000, he brings 26+ years of experience. He regularly sees Medicare patients with high cholesterol and hypertension (per CMS claims data).

At a glance

  • Prescribes opioids less than 26% of reporting doctors in California
  • Virtual visits available — no app or travel required
1 of 3,565 Internal Medicine providers in CASee all Internal Medicine in Sunnyvale26+ years experienceNPI since 2006

Older · 5286dNPPES updated 2011-12-02 · verify NPI on CMS · Verify license at Medical Board of California

Contact & Location

Practice Location

401 Old San Francisco Rd, Sunnyvale, CA 94086-6387

CMS Clinical Data

How Does This Doctor Compare?

Based on Medicare data, this doctor prescribes opioid pain medications conservatively.

Opioid Rx

↓ Lower = better

3.84%

California avg: 5.2 · US avg: 5.1

Higher than most doctors nationally(-1.3 pts)

3.84% of this doctor's prescriptions are opioid pain medications. Lower means more cautious prescribing.

Medicare Patients

171

Unique beneficiaries

Standard volume

Prescription Recipients

232

Patients prescribed

Prescriptions Written

2,290

Total claims

Total Medicare drug cost: $168k

Percentile rankings compared against 9,360 reporting peers in California.

Data Note: Sourced from CMS Medicare Provider Utilization & Payment Data. Percentile rankings compare this provider against all peers with reported data in the same state. Updated annually to reflect the latest federal reporting cycle.

Patient Condition Panel

What This Doctor Treats Most

Based on Medicare claims data — here's what patients commonly see this doctor for

Based on Medicare data, this doctor primarily manages High Cholesterol, Hypertension, and Diabetes.

High Cholesterol
Lower than avg (-2%)68%

Elevated cholesterol or triglycerides that increase heart disease risk

US avg: 70.4%

↓ Fewer patients than average (-2%) — less common here

Hypertension
Lower than avg (-3%)67%

High blood pressure — a leading risk factor for heart disease and stroke

US avg: 70.2%

↓ Fewer patients than average (-3%) — less common here

Diabetes
Lower than avg (-7%)27%

A condition where the body cannot properly regulate blood sugar levels

US avg: 34.5%

↓ Fewer patients than average (-7%) — less common here

Arthritis
Lower than avg (-23%)26%

Joint inflammation causing pain, swelling, and stiffness

US avg: 49.3%

↓ Fewer patients than average (-23%) — less common here

GeneralBehavioralNational avg

Percentage of this provider's Medicare patients diagnosed with each condition. Source: CMS Utilization Data.

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Background & Specialty

Education, training, and specialty classification from CMS NPPES and Medicare records.

Career Journey
  1. Graduated medical school · 2000

    University of California, Davis School of Medicine

  2. 26 years in practice

    Experienced

Internal MedicineAllopathic & Osteopathic Physicians

A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.

Taxonomy: 207R00000X

Education & Training

University of California, Davis School of Medicine (Class of 2000)

Practice Footprint

Mailing address

2350 W El Camino Real 2nd Floor, Mountain View, CA 94040-6201

Differs from practice location

Virtual Internal Medicine Care With Leon Cheng

NPPES records indicate this provider offers telehealth services. Contact the office to confirm availability and scheduling.

Schedule a virtual visit with Leon Cheng for cholesterol management, blood pressure monitoring, diabetes check-ins — no travel to Sunnyvale required. The office sends a secure video link before your appointment. Most visits take 15–30 minutes. Medicare enrolled per CMS records.

Frequently Asked Questions

Common questions about Leon Cheng

Dr. Cheng is listed as active in the NPI registry with telehealth listed in Sunnyvale, CA. NPI status alone doesn't confirm open availability — call the office to confirm. Phone: (408) 730-4262.

Verified across 4 federal data sources

Sourced from CMS NPPES · OIG LEIE · CMS Medicare Part D · CMS Physician Comparator. See Data Methodology.

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Medical Disclaimer: NPI Telehealth is a provider directory for informational purposes only. This page does not constitute medical advice, diagnosis, or treatment recommendations. Provider data is sourced from the CMS NPPES federal registry and public Medicare datasets. NPI Telehealth does not verify clinical qualifications beyond federal records. Data may not reflect real-time availability — always contact the provider's office directly to confirm details before seeking care.

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